Year	U.S. dollars (Billions)
2011	3.125
2012	-1.793
2013	-0.581
2014	-0.184
2015	0.253
2016	0.568
2017	0.173
2018	0.342
2019	0.084
2020	-1.023
2021	-0.557
2022	0.783
2023	0.125
2024	0.256
2025	0.401
2026	0.448
2027	0.476
2028	0.259
2029	0.132